Alicia Keys, who played the Garden last Wednesday, had a nice surprise for the Bronx high school kids from WHEDco (Women’s Housing and Economic Development) — who are shooting “Alicia Keys: The Chronicles,” a se ries for Fuse as part of its “Fuse Rocks the Classroom” program.

The students were inter viewing Keys, on camera, just before she took the stage, when she told them they were in for a big surprise. She was later joined by (the pre viously unannounced) Be yonce and Jay-Z. It’ll make a nice moment in the upcoming series.

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Books: Ch. 2’s Don Dahler has just authored “Water Hazard,” the followup to his 2009 novel, “A Tight Lie” — which once again features private eye Huck Doyle (and a golf theme).

Relationship therapist Dr. Bonnie Eaker Weil (“Make Up Don’t Break Up”) has just taped a special for Discovery Channel on cyber-sex infidel ity. It’s scheduled to air April 4 at 9 p.m.).

I recently mentioned “Queen of Your Life,” which is co-written by former “Drew Carey Show” co-star Kathy Kinney. She and writ ing partner Cindy Ratzlaff will be signing copies of their book next Wednesday, March 31 (7 p.m.) at Borders (Co lumbus Circle).

“Real Housewives of New York City” co-star Alex McCord and husband Simon van Kempen, meanwhile, have authored “Little Kids, Big City,” which is out April 6. It aims to help “families dealing with the daunting task of raising children in an urban environment,” accord ing to press materials.